单项选择题

Fresh air is ____________ to good health. So you should go out more and take more fresh air.

A．fundamental
B．elementary
C．principal
D．dominant
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单项选择题
New writers are expected to be clear and accurate; the form in which they write or speak is ____________ to that requirement.
A．inferior
B．secondary
C．superior
D．contrary
单项选择题
Young children are likely to be ____________ from getting on with their work even by the slightest thing.
A．bothered
B．distracted
C．interrupted
D．disturbed
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